Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e19aa9b93d7031b…

MALICIOUS

PDF

87.4 KB Created: 2021-02-18 13:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b833b3454f8b2417c9763146ef0de20 SHA-1: d60f31eacbfc6ca6345b245cc5ae06a71c895925 SHA-256: 5e19aa9b93d7031b1517c81ef029fe86cc9040c807e73bca514d3a0931b61c19
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to further malicious content or phishing sites, making this a potential distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/wix?keyword=hoover+power+scrub+elite+manual PDF link annotation
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/3811469.pdfIn PDF document text
    • http://gtomishebs.xyz/wafudiforik1wei.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/4734240.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/04f941609.pdfIn PDF document text
    • http://mafaregasinuviv.22web.org/sudigobemulopuralizu.pdfIn PDF document text
    • http://classicalnaturally.com/tonevisipefoxudebaq4eb.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/rasinu.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/sufaraxukabakedix.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/5744452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff4995e1e6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fcdfb3f0cc94.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/tovonesijenibak.pdfIn PDF document text
    • http://fabulouss.space/assamese_poem_nostalgial1tuv.pdfIn PDF document text
    • https://kewupadaduroj.weebly.com/uploads/1/3/4/6/134689326/f49379f21effb.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/sonulifuxikazod-jewunojatawag-tunenabiz.pdfIn PDF document text
    • https://mufixedak.weebly.com/uploads/1/3/4/6/134602267/1874d0a3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejusadesivuti.epizy.com/lufat.pdfIn PDF document text
    • http://lorabedujeweb.epizy.com/caribbean_airlines_flight_attendant_application_form.pdfIn PDF document text
    • http://mamisiz.rf.gd/mebukimegi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001191a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191A 5332 bytes
SHA-256: c4de4da0fbe6c4e7c0e48316c4cf7a2c5fdadd0dc8c1c35b57db477729a3c1c6
font_01_sfnt_off00012b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B31 11004 bytes
SHA-256: bd13033277e5a025799a54d530d8c93c385b3f90e64797d192d448dd06e121e7

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